JP3564188B2 - Control method of mounting machine in mounting line - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a method of controlling a mounting machine in a mounting line configured to arrange a plurality of mounting machines side by side and mount components on a printed board while transporting the printed board across the respective mounting machines. is there.
[0002]
[Prior art]
Conventionally, a printed circuit board is transported along a transport line, components such as ICs are sucked from a component supply unit by a movable component mounting head, transferred to the printed circuit board, and mounted at a predetermined position on the printed circuit board. Such a mounting machine is generally known. A transport line is formed by arranging a plurality of mounters of this type in series, and a large number of components are mounted on the printed circuit board by each mounter while the printed circuit board is transported across these mounters. Has been done.
[0003]
By the way, when a mounting line is configured by arranging a plurality of mounting machines as described above, it is desirable to distribute the workload of each mounting machine in a well-balanced manner in order to enhance the work efficiency of the mounting line. Therefore, when designing the mounting line, determine the type and number of components to be mounted on each mounting machine in consideration of the mounting capacity of each mounting machine, and thereby balance the workload of each mounting machine. ing.
[0004]
[Problems to be solved by the invention]
However, the mounting capacity of each mounting machine applied in the design of the mounting line is generally the design capacity of each mounting machine itself, such as the mounting speed of the mounting machine, that is, the theoretical mounting capacity, and is substantially The implementation capability is not considered. That is, in each mounting machine constituting the mounting line, the type and number of components to be consumed often differ from each other, so that a difference occurs in a cycle of replenishing components to the component supply unit in each mounting machine. However, such a difference in the replenishment cycle of parts is not considered. Therefore, for example, in the case where only a component with a large consumption is mounted on one mounting machine, it is necessary to frequently stop the mounting machine in order to replenish the component, and as a result, as a whole mounting line, This will impair the mounting balance.
[0005]
Therefore, in the above-described mounting line, each mounting machine is based on not only the theoretical capacity of each mounting machine but also the substantial capacity taking into account the maintenance situation, component replenishment situation or error occurrence situation of each mounting machine. It is desirable to distribute the workload of the machine and thereby increase the mounting efficiency.
[0006]
SUMMARY An advantage of some aspects of the invention is to provide a method for controlling a mounting machine in a mounting line that can more effectively increase mounting efficiency.
[0007]
[Means for Solving the Problems]
According to the present invention, a plurality of mounting machines for transferring and mounting components of a component supply unit to a printed board by a component mounting head are arranged side by side, and the components are transferred to the printed board while transporting the printed board over each of the mounting machines. Oite the configured method of controlling a mounting apparatus definitive in mounting line to be worn, and predetermined reference values of the implementation capacity ratio of each mounting machine, each mounting apparatus based on the reference value of this implementation capability ratio the rewritable running the mounting line to set the amount of work, to gather information about the various types of work the amount of each mounting apparatus in the mounting line operation, during the operation stop of the mounting line, of each mounting machine that is collected during operation Obtain the actual mounting capacity ratio of each mounting machine based on the above information, and based on the actual value of the mounting capacity ratio and the reference value, the work load of each mounting machine is a balance suitable for increasing the mounting efficiency. So that each mounting machine Obtains the calibration value of instrumentation capability ratio, is obtained so as to correct the workload of each mounting apparatus based on this calibration value.
[0008]
[Action]
According to the present invention, the mounting capacity ratio of each mounting machine constituting the mounting line is information on the work load of each mounting machine within a predetermined period, that is, the number of finished printed boards, required mounting time, maintenance status, component replenishment status. Alternatively, correction is performed based on various information such as an error occurrence state, and the distribution of the workload of each mounting machine is corrected based on the corrected mounting capability ratio. Therefore, it is possible to appropriately distribute the balance of the workload of each mounting machine according to the substantial mounting capacity of each mounting machine.
[0009]
【Example】
An embodiment of the present invention will be described with reference to the drawings.
[0010]
FIG. 1 is a schematic plan view showing a mounting line to which a control method of a mounting machine according to the present invention is applied. As shown in the figure, a plurality of mounting machines, in the illustrated example, two mounting machines 2A and 2B are arranged in series on the mounting line 1. Conveyors 3A and 3B for transporting printed circuit boards are provided on the bases of the mounting machines 2A and 2B, respectively, and components are mounted while the printed circuit board P is transported along these conveyors 3A and 3B. It has become to be.
[0011]
In the mounting machine 2A, component supply units 4 are disposed on both sides of the conveyor 3A. The component supply unit 4 is provided with multiple rows of tape feeders for supplying components. Each tape feeder holds, at regular intervals, a tape containing a large number of chip components such as fixed resistors and ceramic capacitors wound around a reel, and a portion of the tape facing the conveyor 3A. Is guided to a component take-out unit provided in the system, so that components can be taken out. Then, at the time of mounting, the chip components are successively taken out while the tape is intermittently fed out by a feeding mechanism (not shown) with the picking up of the components by the component mounting head 5A to be described later.
[0012]
Above the base of the mounting machine 2A, a component mounting head 5A (hereinafter abbreviated as head 5A) connected to a moving mechanism (not shown) is provided. The head 5A is movable across the component supply unit 4 and the printed circuit board P positioned at a predetermined work position on the conveyor 3A. In this embodiment, the head 5A is in the X-axis direction (the direction of the conveyors 3A and 3B) and the Y-axis. It can be moved in the axial direction (the direction orthogonal to the X axis on the horizontal plane).
[0013]
Although not shown, the head 5A is provided with one or a plurality of nozzle members for sucking components, and a negative pressure is supplied to the nozzle members. That is, at the time of mounting, the head 5A is moved to the component supply unit 4 to supply a negative pressure to the nozzle member, so that the chip component is picked up from the tape feeder while being sucked by the nozzle member. Then, the head 5A is moved to the printed circuit board P, and the supply of the negative pressure to the nozzle member is cut off, so that components are mounted on the printed circuit board P.
[0014]
The above is a description of the mounting machine 2A, but the mounting machine 2B also has basically the same configuration as the mounting machine 2A in that it has a component suction head 5B having a nozzle member and a component supply unit. ing. However, unlike the mounting machine 2A, the mounting machine 2B is provided with three types of component supply units 6, 7, and 8 on both sides of the component supply unit 4 to supply different types of components.
[0015]
The component supply unit 6 is provided with multiple rows of tape feeders, similarly to the component supply unit 4 of the mounting machine 2A, and is configured to supply chip components such as fixed resistors similarly to the component supply unit 4. Has become.
[0016]
The component supply unit 7 includes a plurality of rows of stick feeders. Each stick feeder has, for example, a detachable cylindrical case containing parts such as SOPs arranged in a row, and the parts contained in this case are taken out at a part facing the conveyor 3B. And is ready to be taken out. Then, as the head 5B takes out the component from the component take-out unit, the components stored in the case are sequentially guided to the component take-out unit.
[0017]
A tray on which a large number of large components such as PLCC and QFP are arranged vertically and horizontally on a plane is set in the component supply unit 8. During mounting, the components on the tray are picked up by the head 5B being arranged above each component and being sucked by the nozzle member.
[0018]
Next, a control system of the mounting line will be described with reference to a block diagram of FIG.
[0019]
As shown in the figure, the mounting line 1 is provided with a general control device 10 for controlling the overall operation of the entire line, and the mounting machines 2A and 2B are connected to the general control device 10. Have been.
[0020]
Each of the mounting machines 2A and 2B stores mounting data, that is, data relating to the type and mounting position of the component to be mounted. During the operation of the mounting line 1, component mounting is performed based on the mounting data. It has become to be.
[0021]
The mounting machines 2A and 2B are provided with performance data storage units 9A and 9B, respectively, and the performance data during the operation of the mounting line 1 is stored in the storage units 9A and 9B, and the integrated control device 10A. To be output. For example, mounting history such as mounting time per unit number of components in each of the mounting machines 2A and 2B or machine stop time due to component replenishment to each of the component supply units 4, 6, 7, and 8 and errors is used as actual data. The information is stored in the storage units 9A and 9B.
[0022]
On the other hand, the overall control device 10 is provided with a capability evaluation unit 11, a storage unit 12, a main operation unit 13, and the like. The capability evaluation unit 11 reads the performance data stored in the performance data storage units 9A and 9B of the mounting machines 2A and 2B, and evaluates the mounting performance of the mounting machines 2A and 2B. Is adapted to compare the performance data read from the performance data storage units 9A and 9B between the mounting machines 2A and 2B to obtain the ratio of the mounting time per unit component in each of the mounting machines 2A and 2B. .
[0023]
The main processing unit 13 is stored in each of the mounting machines 2A and 2B based on the evaluation data by the performance evaluation unit 11 and the reference evaluation data (mounting capability ratio) stored in the storage unit 12. This is to correct the mounting data.
[0024]
Here, the reference evaluation data is data serving as a reference of the evaluation data obtained by the ability evaluation unit 11. In the present embodiment, the ratio of the mounting time per unit component in design, that is, theoretically, in each of the mounting machines 2A and 2B is stored in the storage unit 12 as initial data.
[0025]
Also, the mounting data of each of the mounting machines 2A and 2B is data relating to a mounting component to be mounted by each of the mounting machines 2A and 2B as described above, and in this embodiment, the mounting between the mounting machines 2A and 2B is performed. It is set in consideration of the capacity ratio. That is, they are set based on the above-mentioned reference evaluation data, and the work load of each of the mounting machines 2A and 2B is distributed so that the mounting efficiency in the mounting line 1 can be optimized.
[0026]
Next, a process for correcting the workload of each mounting machine on the mounting line will be described with reference to the flowchart of FIG.
[0027]
This processing is started automatically after the operation of the mounting line 1 is completed or based on an operator operation. When the processing is started, first, the performance data stored in the performance data storage units 9A, 9B of each of the mounting machines 2A, 2B is read out to the capability evaluation unit 11 of the integrated control device 10, and the evaluation data is obtained. (Steps S1 and S2).
[0028]
When the evaluation data is obtained, the main calculation unit 13 determines whether or not the evaluation data matches the reference evaluation data stored in the storage unit 12 (Step S3). Here, when the evaluation data and the reference evaluation data match, it is determined that the work amount of each of the mounting machines 2A and 2B is maintained in balance, and this flowchart ends.
[0029]
On the other hand, if the evaluation data is different from the reference evaluation data in step S3, that is, if the work load of each of the mounting machines 2A and 2B is not maintained, the evaluation data obtained by the capability Calibration evaluation data is obtained based on the reference evaluation data (step S4).
[0030]
When the calibration evaluation data is obtained, the mounting data of each mounting machine 2A, 2B stored in the storage unit 12 is read out to the main processing unit 13, and the work in each mounting machine 2A, 2B is performed based on the calibration evaluation data. The mounting data of each of the mounting machines 2A and 2B is corrected so that the balance of the amounts is optimal in terms of mounting efficiency (steps S5 and S6).
[0031]
For example, the mounting data is modified so that a part of the component to be mounted by the mounting machine 2A is mounted by the mounting machine 2B. In this case, in the embodiment, each of the mounting machines 2A and 2B is provided with the component supply units 4 and 6 having the same structure and provided with a tape feeder, thereby supplying the same chip component to each of the mounting machines 2A and 2B. Therefore, the mounting data is corrected between the component supply units 4 and 6 within a range where the mounted components can be mutually changed. If the component supply unit can be largely replaced between the mounting machines 2A and 2B, the mounting data may be changed without being limited to the above conditions.
[0032]
When the correction of the mounting data of each of the mounting machines 2A and 2B is completed in this way, the mounting data after the correction is updated and stored in the storage unit 12, and the calibration evaluation data is updated in the storage unit 12 as the reference evaluation data. It is stored (step S7).
[0033]
Then, the modified mounting data is output to each of the mounting machines 2A and 2B, and is updated and stored in the storage unit of each of the mounting machines 2A and 2B, and this flowchart ends.
[0034]
As described above, according to the mounting line 1 of the embodiment, the reference evaluation data is updated and set based on the actual data of the mounting machines 2A and 2B, and the work in each of the mounting machines 2A and 2B is set based on the reference evaluation data. Since the mounting data of each of the mounting machines 2A and 2B is modified so that the balance of the amounts is optimal in terms of the mounting efficiency of the mounting line 1, the mounting efficiency in the mounting line 1 can be maintained optimally. . Therefore, as compared with a conventional mounting line of this type, in which the work load of each mounting machine is distributed in consideration of only the theoretical mounting capability of each mounting machine, the mounting efficiency is effectively improved.
[0035]
In particular, it is conceivable that a difference in the mounting capacity between each of the mounting machines 2A and 2B may change in accordance with the temporal change of each of the mounting machines 2A and 2B due to the long-term operation of the mounting line 1. According to this, by performing the above-described processing, the balance of the work amount in each of the mounting machines 2A and 2B is corrected so that the mounting efficiency of the mounting line 1 is optimized. Has the advantage that it can be maintained at a high level.
[0036]
The mounting line 1 of the above embodiment is an example of a mounting line to which the control method according to the present invention is applied, and its specific structure can be appropriately changed without departing from the gist of the present invention. is there. For example, in the above-described embodiment, the present invention is applied to the mounting line 1 in which two mounting machines 2A and 2B are arranged in parallel. However, it is needless to say that the present invention is also applicable to a mounting line in which more mounting machines are arranged in parallel. is there. The mounting machines 2A and 2B are mainly devices for only mounting components. For example, a mounting machine of a type that mounts components while applying cream solder or the like to a printed circuit board (also has a dispenser function). The same is applicable to a case where the mounting line 1 is configured by providing a mounting machine 1).
[0037]
Further, in the above embodiment, information such as the mounting time per unit component in each of the mounting machines 2A and 2B or the machine stop time due to component replenishment to each of the component supply units 4, 6, 7, and 8 and an error is recorded. Are stored in the performance data storage units 9A and 9B, but the content of the performance data is appropriately selected so as to obtain information that is advantageous for determining the distribution of the workload according to the type of the mounting machine. What should I do?
[0038]
Further, in each of the mounting machines 2A and 2B of the above embodiment, the components are sucked by the nozzle member of the head 5 and are mounted on the printed circuit board. No problem.
[0039]
【The invention's effect】
As described above, according to the present invention, the mounting capability ratio of each mounting machine constituting the mounting line is information on the work load of each mounting machine within a predetermined period, that is, the number of finished printed boards, the required mounting time, Correction is performed based on various information such as maintenance status, component replenishment status or error occurrence status, and the work load distribution of each mounting machine is corrected based on the corrected mounting capacity ratio. It is possible to appropriately distribute the balance of the workload in each mounting machine according to the mounting capacity. Therefore, the mounting efficiency in the mounting line can be more effectively increased, and can be maintained for a long time.
[Brief description of the drawings]
FIG. 1 is a schematic plan view showing a mounting line to which a method for controlling a mounting machine according to the present invention is applied.
FIG. 2 is a block diagram showing a control system of the mounting line.
FIG. 3 is a flowchart illustrating a process for correcting the workload of each mounting machine in the mounting line.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Mounting line 2A, 2B Mounting machine 3A, 3B Conveyor 4, 6, 7, 8 Component supply part 5A, 5B Component mounting head 9A, 9B Result data storage part 10 Overall control device 11 Performance evaluation part 12 Storage part 13 Main calculation Part P Printed circuit board

Claims (1)

A plurality of mounting machines for transferring and mounting the components of the component supply unit to the printed circuit board by the component mounting head are arranged side by side, and the components are mounted on the printed circuit board while transporting the printed circuit board over each of the mounting machines. Oite the mounter control method for definitive the configured mounting line,
Predetermining a reference value of implementation capacity ratio of each mounter, The rewritable run mounting line by setting the workload of each mounting apparatus based on the reference value of the implementation capacity ratio, each in mounting line running Gather information on the various workloads of the mounting machine,
While the operation of the mounting line is stopped, the actual mounting capacity ratio of each mounting machine is determined based on the information of each mounting machine collected during operation, and based on the actual value of the mounting capacity ratio and the reference value. Calculate the calibration value of the mounting capacity ratio of each mounting machine so that the workload of each mounting machine is in a balance suitable for increasing the mounting efficiency, and correct the workload of each mounting machine based on this calibration value A method for controlling a mounting machine in a mounting line.

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